"""
Copyright (c) 2022 Guangdong University of Technology
PhotLab is licensed under [Open Source License].
You can use this software according to the terms and conditions of the [Open Source License].
You may obtain a copy of [Open Source License] at: [https://open.source.license/]

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.

See the [Open Source License] for more details.

Author: Meng Xiang, Junjiang Xiang
Created: 2023/8/19
Supported by: National Key Research and Development Program of China
"""



import numpy as np

def phase_shift(input, phase = 0):
    """相移器

    Args:
        input：输入信号
        phase：相位

    Returns:
        output：相移后的信号

    """

    output = input * np.exp(1j * np.pi * phase/180)
    return output


